Near miss with a Milwaukee sawzall on this remodel job pissed me off

Out here in north jersey, we were ripping out some old cabinets in a 1920s house, and i almost took off two fingers with my milwaukee m18 sawzall because the blade guard jammed on a nail. the homeowner's wiring was a mess, no labels or anything, and i hit a live 120v line that arced like crazy, could've been a $5000 hospital bill easy. SMH, these old houses are death traps for handymen. i told the guy in handyman nation facebook group about it and he said same crap happens all the time up here. now i double check every stud with a franklin sensor before cutting. seriously, apprentices, don't skip that step or you'll be screwed.